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Description

Dissection engine LZ77 decompression crash in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service

PUBLISHED Reserved 2026-04-17 | Published 2026-04-30 | Updated 2026-04-30 | Assigner GitLab




MEDIUM: 5.5CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Problem types

CWE-1325: Improperly Controlled Sequential Memory Allocation

Product status

Default status
unaffected

4.6.0 (semver) before 4.6.5
affected

4.4.9 (semver) before 4.4.15
affected

Credits

Sharon Brizinov finder

References

gitlab.com/wireshark/wireshark/-/work_items/21127 exploit

www.wireshark.org/security/wnpa-sec-2026-28.html

gitlab.com/wireshark/wireshark/-/issues/21127 (GitLab Issue #21127) issue-tracking permissions-required

cve.org (CVE-2026-6533)

nvd.nist.gov (CVE-2026-6533)

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